35 lines
1.2 KiB
Python
35 lines
1.2 KiB
Python
from __future__ import annotations
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import numpy as np
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from backend.node_registry import register_node
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from backend.data_types import DataField
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@register_node(display_name="Colormap Adjust")
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class ColormapAdjust:
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@classmethod
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def INPUT_TYPES(cls):
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return {
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"required": {
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"field": ("DATA_FIELD",),
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"offset": ("FLOAT", {"default": 0.0, "min": -1.0, "max": 1.0, "step": 0.01}),
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"scale": ("FLOAT", {"default": 1.0, "min": 0.05, "max": 4.0, "step": 0.01}),
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"auto": ("BUTTON", {"label": "Auto", "set_widgets": {"offset": 0.0, "scale": 1.0}}),
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}
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}
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OUTPUTS = (
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('DATA_FIELD', 'field'),
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)
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FUNCTION = "process"
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DESCRIPTION = (
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"Adjust how a DATA_FIELD maps into its colormap without changing the underlying data. "
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"offset and scale operate in normalized display coordinates; Auto resets to the full data range."
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)
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def process(self, field: DataField, offset: float, scale: float) -> tuple:
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scale = float(scale)
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if not np.isfinite(scale) or scale <= 0.0:
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raise ValueError("Scale must be a positive number.")
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return (field.replace(display_offset=float(offset), display_scale=scale),)
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